https://brunch.co.kr/@lars/9
/etc/sysconfig/systat 에서 HISTORY를 수정/etc/cron.d/sysstat 설정에 의해 cron 잡 실행하여 기록 (모니터링 주기 설정)/var/log/sa 에 기록됨
CPU 통계
$ sar
Linux 2.6.32-642.11.1.el6.x86_64 (jongpak.host) 05/29/2017 _x86_64_ (8 CPU)
...
10:47:01 PM CPU %user %nice %system %iowait %steal %idle
10:48:01 PM all 14.16 0.00 0.33 0.00 0.00 85.51
10:49:01 PM all 14.17 0.00 0.32 0.00 0.00 85.51
10:50:01 PM all 14.01 0.00 0.31 0.00 0.00 85.67
10:51:01 PM all 14.37 0.00 0.46 0.02 0.00 85.15
10:52:01 PM all 14.17 0.00 0.35 0.00 0.00 85.49
10:53:01 PM all 13.95 0.00 0.32 0.01 0.00 85.73
10:54:01 PM all 14.11 0.00 0.32 0.00 0.00 85.57
Average: all 14.23 0.00 0.36 0.00 0.00 85.40
RAM 통계 (-r)
$ sar -r
Linux 2.6.32-642.11.1.el6.x86_64 (jongpak.host) 05/29/2017 _x86_64_ (8 CPU)
...
10:33:02 PM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit
10:34:01 PM 5532096 27348180 83.18 3508644 19309336 2141556 5.78
10:35:01 PM 5532340 27347936 83.17 3508644 19309380 2135348 5.76
10:36:01 PM 5532424 27347852 83.17 3508644 19309612 2139508 5.77
10:37:01 PM 5532324 27347952 83.17 3508644 19309676 2136360 5.76
10:38:01 PM 5532308 27347968 83.17 3508644 19309648 2134348 5.76
10:39:01 PM 5531772 27348504 83.18 3508644 19309504 2137504 5.77
10:40:01 PM 5531456 27348820 83.18 3508644 19309592 2134396 5.76
10:41:01 PM 5532284 27347992 83.17 3508644 19309700 2137480 5.77
Average: 5683019 27197257 82.72 3507169 19162352 2147608 5.79
디스크 통계 (-b)
$ sar -b
Linux 2.6.32-642.11.1.el6.x86_64 (jongpak.host) 05/29/2017 _x86_64_ (8 CPU)
...
10:33:02 PM tps rtps wtps bread/s bwrtn/s
10:34:01 PM 28.16 0.00 28.16 0.00 658.19
10:35:01 PM 28.12 0.02 28.10 0.13 663.87
10:36:01 PM 28.57 0.00 28.57 0.00 885.30
10:37:01 PM 27.54 0.00 27.54 0.00 667.04
10:38:01 PM 27.76 0.00 27.76 0.00 647.25
10:39:01 PM 28.40 0.00 28.40 0.00 676.93
10:40:01 PM 28.18 0.00 28.18 0.00 654.93
Average: 29.30 0.04 29.26 1.57 846.55